{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{2}{c}}
\hline\hline
                    &\multicolumn{1}{c}{\specialcell{Uses any \\ new source}}&\multicolumn{1}{c}{\specialcell{Fraction \\ water from \\ new source }}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   \\
\hline
Treated             &       0.144***&       0.084***\\
                    &     (0.017)   &     (0.012)   \\
Constant            &       0.117***&       0.099***\\
                    &     (0.009)   &     (0.008)   \\
\hline
R$^2$               &        0.06   &        0.04   \\
N                   &        6051   &        6051   \\
\hline\hline
\end{tabular}
}
